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Configuring Class of Service
You configure class of service (CoS)
when you need to override the default packet forwarding behavior of a Services Router—especially
in the three areas identified in Table 111.
Table 111: Reasons to Configure
Class of Service (Cos)
|
Default Behavior to Override with CoS
|
CoS Configuration Area
|
|
Packet classification—By default,
the Services Router does not use behavior aggregate (BA) classifiers to
classify packets. Packet classification applies to incoming traffic.
|
Classifiers
|
|
Scheduling queues—By default, the Services Router has
only two queues enabled. Scheduling queues apply to outgoing traffic.
|
Schedulers
|
|
Packet headers—By default, the Services Router does
not rewrite CoS bits in packet headers. Rewriting packet headers applies to
outgoing traffic.
|
Rewrite rules
|
You can use either J-Web Quick Configuration or a configuration
editor to configure CoS. This chapter contains the following topics. For more
information about CoS, see the JUNOS Class of Service Configuration Guide.
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